Trying to compile the integrate_1d example fails

[mitzimorris]

what mcol said - my comments on this thread -

How to use "integrate_1d"

call to integrate_1d is missing relative tolerance argument - this works: target += log(integrate_1d(normal_density, left_limit, right_limit, theta, x_r, x_i, 0.01)); I’m looking into the discrepancy between the documentation, which indicates rel_tol is optional, and above behavoir, which show that it isn’t.

can fix docs once we establish what’s going on.